Clandestine vs. Clandescent

Clandestineadjective

Done or kept in secret, sometimes to conceal an illicit or improper purpose.

‘clandestine military operations’;

Clandescentadjective

(nonstandard) secret, clandestine

‘I had no idea she was having a clandescent affair.’;

Clandestineadjective

Not recognized as a regular member.

Clandestineadjective

Conducted with secrecy; withdrawn from public notice, usually for an evil purpose; kept secret; hidden; private; underhand; as, a clandestine marriage.

Clandestineadjective

conducted with or marked by hidden aims or methods;

‘clandestine intelligence operations’; ‘cloak-and-dagger activities behind enemy lines’; ‘hole-and-corner intrigue’; ‘secret missions’; ‘a secret agent’; ‘secret sales of arms’; ‘surreptitious mobilization of troops’; ‘an undercover investigation’; ‘underground resistance’;